The components of kin competition

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

It is well known that competition among kin alters the rate and often the direction of evolution in subdivided populations. Yet much remains unclear about the ecological and demographic causes of kin competition, or what role life cycle plays in promoting or ameliorating its effects. Using the multilevel Price equation, I derive a general equation for evolution in structured populations under an arbitrary intensity of kin competition. This equation partitions the effects of selection and demography, and recovers numerous previous models as special cases. I quantify the degree of kin competition, α, which explicitly depends on life cycle. I show how life cycle and demographic assumptions can be incorporated into kin selection models via α, revealing life cycles that are more or less permissive of altruism. As an example, I give closed-form results for Hamilton's rule in a three-stage life cycle. Although results are sensitive to life cycle in general, I identify three demographic conditions that give life cycle invariant results. Under the infinite island model, α is a function of the scale of density regulation and dispersal rate, effectively disentangling these two phenomena. Population viscosity per se does not impede kin selection.

Original languageEnglish (US)
Pages (from-to)2840-2854
Number of pages15
JournalEvolution
Volume64
Issue number10
DOIs
StatePublished - Oct 2010
Externally publishedYes

Fingerprint

Life Cycle Stages
life cycle (organisms)
life cycle
Demography
kin selection
demographic statistics
altruism
Population
Altruism
demography
Islands
Viscosity
viscosity
developmental stages

Keywords

  • Altruism
  • Density dependence
  • Dispersal
  • Hard selection
  • Kin selection
  • Population viscosity
  • Price equation
  • Scale of competition
  • Soft selection
  • Subdivided populations

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Ecology, Evolution, Behavior and Systematics
  • Genetics

Cite this

The components of kin competition. / Van Dyken, James.

In: Evolution, Vol. 64, No. 10, 10.2010, p. 2840-2854.

Research output: Contribution to journalArticle

Van Dyken, James. / The components of kin competition. In: Evolution. 2010 ; Vol. 64, No. 10. pp. 2840-2854.
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